Enable the security advisories process

[adiroiban]

This is mostly paperwork to get the standard GitHub security process up and running.

The process is already enabled at https://github.com/twisted/pydoctor/security/advisories

This is just to get the specific file for GitHub

[adiroiban]

this is read for review. thanks

needs-review

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.59%. Comparing base (0743773) to head (bbca266).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #812   +/-   ##
=======================================
  Coverage   92.59%   92.59%           
=======================================
  Files          47       47           
  Lines        8402     8402           
  Branches     1853     1853           
=======================================
  Hits         7780     7780           
  Misses        357      357           
  Partials      265      265           

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[adiroiban]

Thanks for the review

With this merged, we have the GitHub security links enabled ... it's not much, but just to make it easier to discover them

https://github.com/twisted/pydoctor?tab=security-ov-file